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Finding the Fourth Proportional to 121,807.84, 168,024.72 and 71,497.12

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Solution

The fourth proportional to 121,807.84, 168,024.72 and 71,497.12 is: 98,624.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,807.84 : 168,024.72 = 71,497.12 : x
  2. Step 2: Convert to fraction form
    121,807.84/168,024.72 = 71,497.12/x
  3. Step 3: Cross multiply
    121,807.84x = 168,024.72 × 71,497.12
  4. Step 4: Simplify right side
    121,807.84x = 12,013,283,568.81
  5. Step 5: Solve for x
    x = 12,013,283,568.81/121,807.84
  6. Step 6: Final answer
    x = 98,624.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.